informatics practices class 12 record file cbse

DELHI PUBLIC SCHOOL navi mumbai

RECORD FILE

Name: Sarthak singh Class/section : XII B School seal :

Roll no :

Program 1 : To print odd numbers between 2 numbers accepted from the user

3

CODING : Program 1

int n1,n2;

n1=Integer.parseInt(t1.getText());

n2=Integer.parseInt(t2.getText());

If(n1>n2)

{for(int i=n2;i<=n1;i++)

if(i%2!=0)

ta1.append(i+"\n");}

else

{for(int j=n1;j<=n2;j++)

if(j%2!=0)

ta1.append(j+"\n");

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Program 2:Print the sum and average of all the numbers entered by the user using do-while loop.

5

CODING :

{float avg=0;

int a,sum=0,count=0;

do

{String n=JOptionPane.showInputDialog("enter the number");

a=Integer.parseInt(n);

sum=sum+a;

count++;}

while(a!=0);

avg=sum/(count-1);

t1.setText(""+sum);

t2.setText(""+avg);}

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Program 3 : To print the sum of ( 1 + 1/1! + 1/2! + 1/3! + …………………………. + 1/n! ) where n is the value taken from the user.

7

CODING:

import javax.swing.JOptionPane;

double fact=1,n,sum=1;

n=Double.parseDouble(t1.getText());

for(int x=1;x<=n;x++){

fact=fact*x;

sum=sum+(1/fact);

continue;}

t2.setText(""+sum);

8

Program 4 :To print the following :

CODING :

for(int i=1;i<=6;i++){

for(int j=i;j>=1;j--)

ta1.append(j+" ");

ta1.append("\n");}

9

Program 5 :To print the following :

CODING:

int k=1;

for(int i=1;i<=4;i++){

for(int j=1;j<=i;j++)

{ta1.append(k+" ");

k++;}

ta1.append("\n");}

10

Program 6: To print the following :

CODING :

for(char i='a';i<='d';i++)

{for(char j='a';j<=i;j++)

ta1.append(i+" ");

ta1.append("\n");

}

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Progaram 8:

Consumption level 1st(200) 2nd(200) Above(400)Domestic power 2.45 3.95 4.65

Non-domestic upto 10KW

5.40 5.40 5.40

Non-domestic above 10KW

4.92 4.92 4.92

Agriculture upto 10KW

1.55 1.55 1.55

Agriculture above 10KW

9.84 9.84 9.84

Industrial upto 10KW

4.40 4.40 4.40

Industrial above 10KW

5.05 5.05 5.05

When user select radio button(domestic power button) disable both the check boxes.

2 When user clicks on the radio buttons both the check box will be enabled.

3 Exit button - Terminate the program.

4 Clear button-Clear text box, radio button, check box.

12

Coding:

import java.awt.Color;

import javax.swing.JOptionPane;

setTitle("BILL AMOUNT");

initComponents()this.getContentPane().setBackground(Color.yellow);

b1.setToolTipText("Calculate");

b2.setToolTipText("Clear");

b3.setToolTipText("Exit");

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BUTTON CODING:

double units,amt=0;

units=Double.parseDouble(t1.getText());

if(r1.isSelected()==true)

{

if(units<=200)

amt=(2.45)*units;

else if(units<=400)

amt=(2.45)*200+(200-units)*3.95;

else if(units>400)

amt=(2.45)*200+(3.95)*200+(units-200)*4.65;

ta1.append("The bill for Domestic power is Rs"+amt);

}

else if(r2.isSelected()==true)

{if(c1.isSelected()==true)

amt=units*(5.40);

if(c2.isSelected()==true)

amt=units*(4.92);

ta1.append("The bill for Non-domestic power is Rs"+amt);}



amt=units*(1.55);

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amt=units*(9.84);

ta1.append("The bill for Non-domestic power is Rs"+amt);}



amt=units*(4.40);


amt=units*(5.05);

ta1.append("The bill for Industrial power is Rs"+amt);}

Clear button code:

t1.setText("");

bg1.clearSelection();

c1.setSelected(false);

c2.setSelected(false);

ta1.setText("");

Exit button code:

JOptionPane.showMessageDialog(null,"Going to exit","Exit command",2);

System.exit(0);

15

Disable command:

For domestic:

c1.setEnabled(false);

c2.setEnabled(false);

For Non-domestic:

c1.setEnabled(true);


For Agricultural:



For Industrial:



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Program 9 :To accept the mode of payment from the user by using combo box and print the net amount.

CODING:

double i=c1.getSelectedIndex();

double amt,dis=0;

amt=Double.parseDouble(t2.getText());

if(i==0)

dis=0.10;

if(i==1)

dis=0.20;

if(i==2)

dis=0.05;

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t3.setText(""+(amt*dis));

t4.setText(""+(amt-(amt*dis)));

Disable command:

t3.setEnabled(false);

t4.setEnabled(false);

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Program 10: Make a student class .Give access specifier as private to Firstname,Lastname,stream,doj and make a constructors to initialize their values.

Coding:

class student{

private String fname,lname;

student(String fn,String ln){

fname=fn;

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lname=ln;}

void printdata(){

ta1.append("First name:"+fname+"\nLast name:"+lname);

}

}

class graduate extends student{

private String stream,doj;

graduate(String fn,String ln,String s,String d){

super(fn,ln);

stream=s;

doj=d;

}

void printgrade(){

ta1.append("\nStream:"+stream+"\nDate of joining:"+doj);}}

Calling Code:

String fname=t1.getText();

String lname=t2.getText();

String stream=t3.getText();

String doj=t4.getText();

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graduate g1=new graduate(t1.getText(),t2.getText(),t3.getText(),t4.getText());

g1.printdata();

g1.printgrade();

Program 11:Create a class student with data members (Name,Date of birth,Roll number).Make a method to accept its values and print the data of the student.Subclass of this class is Marks having data members (Total,Percentage,Grade).

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informatics practices class 12 record file cbse

Documents

parseint

program 1

gettext